Switch Windows to use Skia for text metrics

Switch the Windows port to use Skia instead of GDI directly for text
metrics, font selection and paint setup.

BUG=249099
R=reed@google.com

Review URL: https://codereview.chromium.org/25773002

git-svn-id: svn://svn.chromium.org/blink/trunk@158845 bbb929c8-8fbe-4397-9dbb-9b2b20218538